5-Leg Pneumatic Stool Premium 23″ cast aluminum base with satin top and black accents 5-leg design for greater stability Full size diameter top and base for comfort and stability 4″ thick seat for comfort Chrome hooded, dual wheel, nylon casters Large, easy to locate, D-shaped height lever Premium, stain resistant, woven, knit-backed upholstery Knock-down design saves on shipping Easy, no-tools assembly Also available with backrest 250 lbs. load capacity under normal use 5-Leg Pneumatic Stool with Backrest Premium 23″ cast aluminum base with satin top and black accents 5-leg design for greater stability Full size diameter top and base for comfort and stability Comfortable backrest 4″ thick seat for comfort Chrome hooded, dual wheel, nylon casters Large, easy to locate, D-shaped height lever Premium, stain resistant, woven , knit-backed upholstery Knock-down design saves on shipping Easy, no-tools assembly 250 lbs. load capacity under normal use